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(No Model) 7 r W. T.-BURROWS.

- CENTER FOR WIRE BABBING MAGHINES.

No. 289,750. 7 Patented Dec. 4, 1883.

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' 5 UNITED STATES:

"ATENT Orrrcs.

\VILLIAM 'I. BURROWS, OF EAST DUBUQUE, ILLINOIS, ASSIGNOR OF TWO- IHIRDS TO ARTHUR G. CHILDREN, OF SAME PLACE.

CENTER FOR WIR'E-BARBING MACHINES.

SPECIFICATION forming part of Letters Patent No. 289,750, dated December 4, 1883. Application filed October 19, 1883. (No model.)

To aZZ whom, it may concern Be it known that I, WILLIAM T. BURRows, of East Dubuque, in the county of J o Daviess and State of Illinois, have invented a new and useful Improvement in Centers for VVire-Barbing Machines; and I do hereby declare that the following is-a full and exact description of the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon.

The present invention relates to an improvement in the construction of centers, or what are commonly known as the strand-wire guides, of wire-barbing machines; and the object I have in view is to increase the dura bility and efficiency of the same without materially increasing the expense, time, and labor required to produce the common and, further, to still keep sufficient space between the two wires at the discharge end of center (where the wires are to be twisted) for the reception and proper accommodation of the barb the same as with the centers now in use. As is well known, these guides consist of a cylindrical rod,of steel,provided with two grooves running longitudinally along the entire guide upon opposite sides of the same, with a twist or turn at a certain point, to give tension to the wires to be twisted. As thus constructed, the center or guide is incased in a rotating and reciprocating cylinder, with which it concurrently operates and longitudinally slides within, to feed and twist the strands of wire carried by its two grooves.

Heretofore it has been the custom to make the grooves of the guide of equal depth from end to end, and to give them the usual twist or turn near the discharge end of the guide, or at that end where the two wires receive the barb and are twisted. Vith such a construction the following disadvantages are found to exist, viz: By the twist occurring near the discharge end of the guide or center, and by making the grooves of equal depth from end to end, the passage of the wire therethrough and the reciprocating motion of the center wear the grooves very rapidly, especially where the twist occurs, and beyond, the edges of the guide grooves become so worn as to allow the wires to slip out and form other grooves nearer in a ry to get it to place to form the barb without the aid of springs to assist such motion of the center. vention is to obviate these disadvantages, and it therein consists, first, [in making the grooves of varying depth, and deepest at and near the receiving end of the center or guide; second, in twisting the center or guide near its receiving end, or near where the grooves are deepest; third, in covering a portion of said grooves either by giving the center or guide a three-quarter twist or apartial twist, and then covering the grooves at or near that point in any appropriate way and, fourth, in still preserving, substantially, the same size of the center and the same space at the discharge end 7 5 for the operation of the barb-formers and for the reception and accommodation of the barb,'it being desirable that the size of the center should not be materially increased or the space between the wires at the discharge or barb-forming end be materially changed from that of the center now in use. Y

For the-better comprehension of this invention, and to enable those skilled in its relative art to know how to construct the same, I will I proceed to describe it with reference to the accompanying drawings, in which Figure 1 is a plan view of that portion of a wire-barbing machine to which my invention is applied, and which is included in the view; 0

Fig. 2, a detail view of the center or guide complete; Fig. 3, a transverse section on the line w 00 of Fig. 2; Fig. 4, aview of the receiving end of the center or guide; Fig. 5, asimilar view of the discharge end of the same; and

Fig. 6, a central longitudinal section of the The object, therefore, of this incenter and grooves, omitting the twist, and I leave insufficient space for the reception of showing how the grooves vary in depth from end to end.

Like letters of reference denote corresponding parts in each figure.

A represents the center or guide, passing centrally through the rotating and reciprocating cylinder 13, which in turn is incased in a hollow rotating and reciprocating head, 0, secured thereto by means of set-screws a a. Through this head 0 pass the two barb-wire guides b b, whose curved discharge ends terminate at the outer end of cylinder B, as does also the discharge end of the center or guide A when at the extreme of its longitudinal motion in the cylinder for the reception of the barb.

Upon opposite sides of the center or guide A are cut the two grooves c c, which receive and carry forward the strand-wires m 00. These grooves vary in depth irregularly from the receiving to the discharge end, being deepest at and near the former, as shown in Fig. 6. The twist is given near the receiving end of the center or guide, and, as illustrated in the drawings, is a three-quarter twist, which, it will be seen, brings together the two edges of each groove for a short distance and forms covered passage-ways, Fig. 3, which prevent the Wires from leaving their grooves-an action heretofore unavoidable. If the center be given a quarter. twist only, then the grooves are to be covered at that point by any appropriate and desirable means, this being left to the option of the workman, it being necessary at all times to cover the grooves, preferably, where the twist occurs. At the discharge end of the center or guide, where the strand-wires have a tendency to hug or come together to be twisted, the grooves must be most shallow, in order that the barb may be cut off and inserted the same as with the centers nowin use. Then when the grooves become so deep as to the barb, this end of the center or guide is required to be cut off, so as to keep the space at the discharge end between the wires as nearly as possible the same as when the center is new. The receiving end of the center or guide A is supported and held by two sleeves, d e, and as the end of the center is cut off and becomes shorter the sleeve d is moved nearer to e, and finally collar 6 may be dispensed with.

From the foregoing description it will be manifest that the wires cannot leave their grooves, and that there is always space enough between the wires at the discharge end of the center for the reception and proper accommodation of the barb.

Having thus described my invention and set forth some of its advantages, what I claim, and desire to secure by Letters Patent, is-

1. A center for wire-barbing machines, having two grooves varying in depth from the receiving to its discharge end, and deepest at the former end, substantially as and for the purpose set forth.

2. A center for wire-barbing machines, having two grooves of varying depth, and a twist near where the grooves are deepest, and near its receiving end, substantially as and for the purpose set forth.

3. A center for wire-barbing machines, having two grooves of varying depth covered at or near the twist of said center, substantially as and for the purpose set forth.

4. A covering for a groove in wire-guides, formed by twisting the metal after the groove is made, substantially as described, shown, and for the purpose set forth.

In testimony whereof I affix my signature in presence of two witnesses.

\VILLIAM T. BURROWVS.

Vitnesses:

MONROE M. CADY, ARTHUR G. CHILDrzEN. 

